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Discutiendo narrativas de sustentabilidad en la literatura sobre minería en aguas profundas y su configuración como frontera de recursos
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Leiva, Sebastián Rodríguez

Finisterra - Revista Portuguesa de Geografia

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Ago 2024, Nº 126 elocation e34104

Resumen: En Pt Es | Texto: En Pt Es | PDF: En | PDF: Pt | PDF: Es

Abstract The energy transition requires minerals that are increasingly difficult to obtain on the surface, so the ocean floor and by virtue of its mineral reserves, could meet projected demand and contribute to achieving the sustainable development goals. However, there are contradictory discourses regarding the role of sustainability in deep-sea mining. On the one hand, it is suggested that it would have less impact than surface mining. On the other hand, it argues about the negative impacts on the ocean and effects on human well-being and the livelihoods of local communities. Thus, the objective is to problematize the relationship between sustainability and deep-sea mining, based on the approach of the resource frontier and how these spaces are produced, the predominant narratives, and what are the dynamics that underlie this process. Using tools of bibliometric analysis and qualitative content analysis, it was possible to account for dominant narratives about circular economy, biodiversity, governance, and blue economy in the literature. Dynamics underlying the creation of the resource frontier are the search for new sources of minerals, the need to control resources, and positioning the ocean as a zone of unlimited development, which configure deep-sea mining as an emerging frontier for sustainability.

Resumo A transição energética exige minerais cada vez mais difíceis de obter na superfície, para que o fundo do oceano e, em virtude de suas reservas minerais, possam atender à demanda projetada e contribuir para alcançar os objetivos de desenvolvimento sustentável. No entanto, há discursos contraditórios sobre o papel da sustentabilidade na mineração em alto mar. Por um lado, sugere-se que teria menos impacto do que a mineração de superfície. Por outro lado, argumenta sobre os impactos negativos no oceano e os efeitos no bem-estar humano e nos meios de subsistência das comunidades locais. Assim, o objetivo é problematizar a relação entre sustentabilidade e mineração em alto mar, a partir da abordagem da fronteira de recursos e, em particular, como esses espaços são produzidos, as narrativas predominantes e quais são as dinâmicas que subjazem a esse processo. Utilizando ferramentas de análise bibliométrica e análise qualitativa de conteúdo, foi possível dar conta das narrativas dominantes sobre economia circular, biodiversidade, governança e economia azul na literatura. As dinâmicas subjacentes à criação da fronteira de recursos são a busca de novas fontes de minerais, a necessidade de controlar os recursos e o posicionamento do oceano como uma zona de desenvolvimento ilimitado, que configuram a mineração em alto mar como uma fronteira emergente para a sustentabilidade.

Resumen La transición energética requiere minerales que cada vez son más difíciles de obtener en superficie, por lo que, el fondo del océano y en virtud de sus reservas de minerales, podría satisfacer la demanda proyectada y contribuir a alcanzar los objetivos de desarrollo sustentable. Sin embargo, existen discursos contradictorios respecto al rol de la sustentabilidad en la minería en aguas profundas. Por un lado, se plantea que tendría menor impacto que la minería en superficie. Por otro lado, se argumenta sobre los impactos negativos en el océano y afectaciones en el bienestar humano y medios de vida de las comunidades locales. Así, el objetivo es problematizar en torno a la relación entre sustentabilidad y minería en aguas profundas, a partir de la aproximación de la frontera de recursos y en particular, cómo se producen estos espacios, las narrativas predominantes, y cuáles son las dinámicas que subyacen en este proceso. Utilizando herramientas del análisis bibliométrico y análisis de contenido cualitativo, se pudo dar cuenta de narrativas dominantes sobre economía circular, biodiversidad, gobernanza, y economía azul en la literatura. Dinámicas que subyacen a la creación de la frontera de recursos son la búsqueda de nuevas fuentes de minerales, la necesidad de controlar los recursos, y posicionar al océano como una zona de desarrollo ilimitado, las que, configuran a la minería en aguas profundas como frontera emergente para la sustentabilidad.

https://doi.org/10.18055/finis34104

JEAN-AUGUSTIN BARRAL
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Wisniak, Jaime

Revista CENIC Ciencias Biológicas

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2024, Volumen 55 Paginas 59 - 69

Resumen: Es En | Texto: Es En | PDF: Es | PDF: En

ABSTRACT Jean-Augustin Victor Barral (1819-1884), a French agronomist, chemist, and physicist, was the first to extract nicotine (tobacco alkali) from the leaves of the plant, analyze it, determine its formula, and demonstrate experimentally that it was a violent poison. It turned blue wet litmus paper and behaved like a fixed alkali. Barral studied extensively the question of chemical balance of living animals and carried the pertinent chemical analysis balance of the solid and liquid foods ingested daily and the amount and elemental composition of the diverse evacuations, transpiration, and excretions, to establish the gain and loss equations of the body. He also carried a heat balance of the same systems. He conducted most of the pertinent experiments on himself and his son, and on sheep. Particular interest was put on the role played by sodium chloride in human and animal economy. This was carried by a careful analysis of the chlorine content of the different streams. He found that the quantity of nitrogen present in the food was higher than that in the evacuations, so that a part of the gas had to be exhaled by perspiration. Also, the evacuations were richer in hydrogen than food in the ratio 1 to 5. Barral studied the composition of rainwater and its influence on vegetation and determined the yearly amounts of nitrogen, ammonia, nitric acid, chlorine, lime, and magnesium that it contributed to the chemical balance of the soil. Barral also carried a detailed experimental analysis of the gilding process and determined the best conditions for performing the art. He also extended the experimental results of Arago and Ampère about the electro-magnetization. Barral's name is one of the 72 names of scientists that Eiffel inscribed in his tower.

RESUMEN Jean-Augustin Victor Barral (1819-1884), un agricultor, químico y físico francés, fue el primero en extraer la nicotina (álcali del tabaco) de las hojas de la planta, analizarla, determinar su fórmula y demostrar en forma experimental que era un veneno violento. La nicotina coloreaba azul al papel tornasol y se comportaba como un álcali fijo. Barral estudió en detalle el problema del balance químico de los animales vivos y llevó acabo los balances químicos pertinentes de los alimentos sólidos y líquidos ingeridos diariamente, así de la cantidad y composición elemental de las distintas evacuaciones, transpiración y excreciones, para establecer las ecuaciones de pérdida y ganancia del cuerpo. También llevo a cabo el balance térmico de los mismos sistemas Condujo la mayor parte de sus experimentos sobre su cuerpo y el de su hijo, así como el de ovejas. Barral puso especial hincapié en el papel que el cloruro de sodio juega sobre la economía humana y animal. Esto lo consiguió mediante un cuidadoso análisis del contenido en cloro de las diversas corrientes. Sus resultados indicaron que la cantidad de nitrógeno contenido en la dieta era mayor que la contenida en las evacuaciones, de modo que parte del nitrógeno debía ser exhalado por la respiración. Igualmente, que las evacuaciones eran más ricas en hidrógeno que la dieta, en la razón 1 a 5. Barral estudió la composición de las aguas de lluvia y su influencia sobre la vegetación. Asimismo, determinó el peso anual de nitrógeno, amoníaco, ácido nítrico, cloro, cal, y magnesio que ellas contribuían al balance químico de los suelos. Barral también estudió en detalle el proceso de dorado y determinó las mejores condiciones para realizarlo en la práctica. También extendió los resultados experimentales de Arago y Ampère acerca de la electro-magnetización. El nombre de Barral es uno de los 72 nombres de científicos franceses que Eiffel inscribió en su torre.

Synthesis of SiO2/ZnO/Fe2O3/ZnFe2O4 from Spent Alkaline Batteries and Mining Tailings Applied as a Photocatalyst and Pseudocapacitor SiO2ZnOFe2O3ZnFe2O4 SiOZnOFeOZnFeO SiO2 ZnO Fe2O3 ZnFe2O4 SiO Fe O ZnFe SiO2/ZnO/Fe2O3/ZnFe2O ZnOFe SiO2ZnOFe2O3ZnFe2O FeO Fe2O ZnFeO ZnFe2O
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Magnago, Luma B.

; Betim, Fernando S.

; Almeida, Jenifer R.

; Moura, Mayra N.

; Coelho, Edson L. D.

; Leal, Vitor M.

; Ferreira, Sandra A. D.

; Lelis, Maria F. F.

; Freitas, Marcos B. J. G.

Journal of the Brazilian Chemical Society

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2024, Volumen 35 Nº 5 elocation e-20230184

Resumen: En | Texto: En | PDF: En

In this study, a mixed oxide (SiO2/ZnO/Fe2O3/ZnFe2O4) was prepared using the anode recycled from alkaline batteries and the silt fraction of mining tailings and applied as a photocatalyst under solar irradiation and as a pseudocapacitor. The structure and morphology of the mixed oxide revealed clusters of nanometric particles with rhombic and octahedral shapes. A 23 full factorial design was performed to determine the effect of pH, hydrogen peroxide (H2O2), and photocatalyst on methylene blue (MB) decolorization. The maximum efficiency was 96%, obtained using 2.35 × 10-5 mol H2O2 and 20 mg of photocatalyst at pH 3 for 30 min under solar irradiation. This efficiency remained even after four successive decolorization cycles. Pseudocapacitive properties showed that the mixed oxide exhibited favorable characteristics for application as electrochemical pseudocapacitors due to its high capacitance (87.16 F g-1), energy density (27.24 Wh kg-1) at 524.41 W kg-1 of power density, and reversibility (93%). The studied mixed oxide has excellent potential for use in photocatalytic reactions and electrochemical devices, contributing to environmental sustainability and circular economy. study SiO2/ZnO/Fe2O3/ZnFe2O4 SiO2ZnOFe2O3ZnFe2O4 SiOZnOFeOZnFeO SiO2 ZnO Fe2O3 ZnFe2O4 SiO Fe O ZnFe (SiO2/ZnO/Fe2O3/ZnFe2O4 pseudocapacitor shapes 2 H2O2, HO , H (H2O2) MB (MB 96 96% 235 35 2.3 105 10 5 10- H2O cycles 87.16 8716 87 16 (87.1 g1, g1 g 1 g-1) 27.24 2724 27 24 (27.2 kg1 kg 52441 524 41 524.4 kg- 93%. 93 93% . (93%) devices economy SiO2/ZnO/Fe2O3/ZnFe2O ZnOFe SiO2ZnOFe2O3ZnFe2O FeO Fe2O ZnFeO ZnFe2O (SiO2/ZnO/Fe2O3/ZnFe2O (H2O2 9 2. 87.1 871 8 (87. g-1 27.2 272 (27. 5244 52 4 524. (93% (H2O 87. (87 g- 27. (27 (93 (8 (2 (9 (

https://doi.org/10.21577/0103-5053.20230184

Sustentabilidade em cinco edificações residenciais utilizando o Selo Casa Azul
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Reis, Mari Aurora Favero

; Minusculli, Patrick

; Reis Jr., Paulo

; Favretto, Jacir

Interações (Campo Grande)

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Abr 2023, Volumen 24 Nº 2 Paginas 703 - 715

Resumen: Es En Pt | Texto: Es En Pt | PDF: Es | PDF: En | PDF: Pt

Resumen La contemplación del sello de sostenibilidad en la construcción civil impacta directamente la calidad de vida de sus ocupantes, la eficiencia energética y la economia operativa de la residencia. Asimismo, la certificación ambiental puede ser utilizada como herramienta de comercialización del inmueble, del município y de la calidad del entorno urbano. El Sello Coso Azul Coixo es un instrumento de clasificación basado en indicadores socioambientales para proyectos de desarrollo habitacional, con el fin de encontrar soluciones más eficientes en el uso de los recursos naturales y en la mejora de la calidad de la vivienda y su entorno. El objetivo es aplicar indicadores de sostenibilidad del Sello Coso Azul Coixo (2010 y 2020), en la evaluación de cinco edifícios residenciales unifamiliares terminados en 2020 en la ciudad de Concórdia, SC. La metodologia es cualitativa y cuantitativa, utilizando como parámetros indicadores de la guía Sello Coso Azul Coixo organizados en seis categorías. Los resultados mostraron que ninguna de las cinco residencias obtuvo el Sello Bronce, ya que no cumplieron con todos los items obligatorios, el estándar de sostenibilidad para ser certificadas. La categoría mejor valorada fue la gestión eficiente del agua, seguida de la producción sostenible. La evidencia permite concluir la probabilidad de no haber considerado los criterios para la obtención del sello en el desarrollo de los proyectos. ocupantes residencia Asimismo inmueble urbano habitacional 2010 (201 2020, , 2020) 202 Concórdia SC cuantitativa categorías Bronce obligatorios certificadas agua sostenible 201 (20 20 (2 2 (

Abstract The contemplation of the sustainability seal in civil construction has a direct impact on the quality of life of its occupants, energy efficiency, and the operational economy of the residence. Also, environmental certification can be used as a marketing tool for the property, the municipality, and the quality of the urban environment. The Coso Azul Coixo Seal is a classification instrument based on socio-environmental indicators for housing development projects to find more efficient solutions in the natural resources use and to improve the quality of housing and its surroundings. The objective was to apply sustainability indicators from the Coso Azul Coixo Seal (2010 and 2020) in evaluating five single-family residential buildings completed in 2020 in the city of Concórdia, SC. The methodology is qualitative and quantitative, using the indicators of the Coso Azul Coixo Seal guide as a parameter, organized into six categories. The results showed that none of the five residences obtained the Bronze Seal, as they did not meet all the mandatory items, the sustainability standard to be certified. The highest-rated category was efficient water management, followed by sustainable production. The evidence makes it possible to conclude the probability of not having considered the criteria for obtaining the seal in developing the projects. occupants efficiency residence Also property municipality environment socioenvironmental socio surroundings 2010 (201 singlefamily single family 202 Concórdia SC quantitative parameter categories items certified highestrated highest rated management production 201 (20 20 (2 2 (

Resumo A contemplação do selo de sustentabilidade na construção civil impacta diretamente a qualidade de vida de seus ocupantes, a eficiência energética e a economia operacional da residência. Também, a certificação ambiental pode ser utilizada como instrumento de marketing para o imóvel, município e a qualidade do ambiente urbano. O Selo Casa Azul Caixa é um instrumento de classificação por intermédio de indicadores socioambientais para projetos de empreendimentos habitacionais, a fim de soluções mais eficientes no uso de recursos naturais e na melhoria da qualidade da habitação e de seu entorno. O objetivo foi aplicar indicadores de sustentabilidade do Selo Casa Azul Caixa (2010 e 2020), na avaliação de cinco edificações residenciais unifamiliares concluídas em 2020, na cidade de Concórdia, SC. A metodologia é do tipo qualitativa e quantitativa, utilizando como parâmetro os indicadores do guia Selo Casa Azul Caixa, organizados em seis categorias. Os resultados demonstraram que nenhuma das cinco residências obteve Selo Bronze, pois não atingiram todos os itens obrigatórios, padrão de sustentabilidade para ser certificada. A categoria mais bem avaliada foi a gestão eficiente da água e, a seguir, produção sustentável. As evidências possibilitam concluir sobre a probabilidade de não terem sido considerados os critérios para obtenção do selo no desenvolvimento dos projetos. ocupantes residência Também imóvel urbano habitacionais entorno 2010 (201 2020 , 2020) Concórdia SC quantitativa categorias Bronze obrigatórios certificada seguir sustentável 201 (20 202 20 (2 2 (

https://doi.org/10.20435/inter.v24i2.3560

A CIRCULAR FOOD ECONOMY MULTICRITERIA DECISION PROBLEM BASED ON THE FITRADEOFF METHOD
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Rico Lugo, Sinndy Dayana

; Du, Bingxin

; Almeida, Jônatas Araújo de

; Nishino, Nariaki

Pesquisa Operacional

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2023, Volumen 43 Nº spe1 elocation e263528

Resumen: En | Texto: En | PDF: En

ABSTRACT The Circular Food Economy is a recent concept referred to co-creative food ecosystems where stakeholders from different echelons work together to improve the chain by using circular economy solutions for managing food loss and waste while increasing stakeholders’ income and reducing the environmental affectation. There is a lack of quantitative information on what should be prioritized when designing circular options considering the actors’ preferences. This study presents an application of the FITradeoff method within the Agri-Food Supply Chain in a multicriteria decision problem of ranking circular economy initiatives using six criteria (CO2 generation, blue-water usage, land usage efficiency, social impact, income, and implementation) and nine hypothetical alternatives artificially created from available data. It explores information regarding preferable alternatives for householders. The results are considered a quantitative starting point for collecting consumers’ preferences as a basis for further research to refine such circular initiatives into more beneficial and attractive ones. cocreative co creative affectation actors AgriFood Agri CO2 CO (CO generation bluewater blue water efficiency impact implementation data householders consumers ones

https://doi.org/10.1590/0101-7438.2023.043spe1.00263528

Regionalism Beyond Land Borders: Strengthening regional integration in Latin America and the Caribbean through blue economy policies Borders
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Santos, Thauan

; Colgan, Charles S.

Revista Brasileira de Política Internacional

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2023, Volumen 66 Nº 2 elocation e018

Resumen: En | Texto: En | PDF: En

Abstract This article seeks to highlight the key role of the blue economy in fostering regional integration of Latin America and the Caribbean (LAC) based on the 2030 Agenda. By proposing a “beyond the boxes” approach, SDG 14 is not the only driver that stands out. Hence, we propose a regionalism beyond the state-centric and land borders, which will require reflecting on and rethinking theories, policies, and practices related to the foundations of regional integration, IR, and the 2030 Agenda itself. The methodology combines UN reports and data from ECLAC, WRI, FAO, UNEP-WCMC, UNESCO-MAB, WWF, UN-DESA, and NOAA. LAC (LAC 203 boxes approach 1 out Hence statecentric state centric borders theories policies IR itself ECLAC WRI FAO UNEPWCMC, UNEPWCMC UNEP WCMC, WCMC UNEP-WCMC UNESCOMAB, UNESCOMAB UNESCO MAB, MAB UNESCO-MAB WWF UNDESA, UNDESA DESA, DESA UN-DESA NOAA 20 2

https://doi.org/10.1590/0034-7329202300218

Challenges faced by SMMEs operating in the ocean economy in KwaZulu-Natal province: A quantitative study
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Zulu, Bheka C.

; Zondi, Bonginkosi W.

; Ngwenya, Tony

Southern African Journal of Entrepreneurship and Small Business Management

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2023, Volumen 15 Nº 1 Paginas 1 - 10

Resumen: En | Texto: En | PDF: En

BACKGROUND: The general state of entrepreneurship reveals that despite the efforts of the South African government to stimulate entrepreneurship through a policy framework, many small, medium and micro-enterprises (SMMEs) remain unsustainable. Small, medium and micro-enterprises in the country continue to experience a high failure rate of almost 70% - 80% within the first 5 years of operation. Policy makers have attempted to advance local economic development through entrepreneurship as a key economic development driver, without success. A significant gap exists in relation to knowledge about and challenges facing SMMEs in the ocean economy. AIM: This study on which this article is based, sought to expand the existing body of knowledge, by examining the challenges faced by SMMEs within the ocean economy in the KwaZulu-Natal province and explore the concept of ocean economy within the South African context SETTING: This study focuses on SMMEs in the KwaZulu-Natal Province. METHODS: The study followed a quantitative research design, with self-administered questionnaires being used to collect data from SMMEs in the ocean economy in KwaZulu-Natal province. RESULTS: Findings of the study reveal that SMMEs operating within the ocean economy encounter various challenges that impend them from being successful in conducting business in their specific areas. The findings reveal that SMMEs in the ocean economy are faced with challenges such as stringent government regulation and labour laws, a lack of start-up capital, a lack of managerial experience and skills, insufficient incentives and support to access to finance and competitive business environment. CONCLUSION: The findings indicate future potential for SMMEs in the ocean economy, based on their ability to grow, overcome challenges and sustain their businesses; however, this may be dependent on the implementation of sustainable economic policy framework. In addressing the challenges facing SMMEs in the ocean economy, continued initiatives should be undertaken to promote increased entrepreneurial and productive activities. CONTRIBUTION: The study contributes to broadening understanding on the challenges faced by SMMEs within the ocean economy in KwaZulu-Natal Province.

https://doi.org/10.4102/sajesbm.v15i1.629

JEAN-AUGUSTIN BARRAL
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Wisniak, Jaime

Revista CENIC Ciencias Biológicas

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2023, Volumen 54 Paginas 69 - 79

Resumen: En Es | Texto: En Es | PDF: En | PDF: Es

Exploración de petróleo offshore frente a las costas de Mar del Plata (Buenos Aires): cronología de un conflicto socioambiental latente
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Morea, Juan Pablo

Revista Universitaria de Geografía

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2023, Volumen 32 Nº 1 Paginas 91 - 131

Resumen: En Es | Texto: En Es | PDF: En | PDF: Es

Abstract The approval of an offshore oil exploration project off the coast of the city of Mar del Plata triggered a conflict with the local community that succeeded in bringing the initiative to a halt with a court order, which generated a public debate on the possible environmental impacts of the project and the implications for the sustainability of the oceans. Through a review of the regulatory framework, project approval documents, journalistic notes and multiple public statements of the actors involved, we sought to reconstruct the chronology of the conflict and reflect the multiple aspects and perspectives of the problem. Based on this work, it was possible to identify the arguments for and against the project and contrast them with scientific evidence generated at an international level, and to frame the case study in the debates on the blue economy and ocean sustainability. The results obtained helped to establish a line of argumentation of the conflict and to identify key elements of the discussion about possible future scenarios that could be applied for the case study.

Resumen La aprobación de un proyecto de exploración petrolera costa afuera frente a las costas de la ciudad de Mar del Plata desencadenó un conflicto con la comunidad local que logró frenar la iniciativa con una medida judicial y desató un debate público sobre los posibles impactos ambientales del proyecto y las implicaciones para la sustentabilidad de los océanos. Mediante una revisión del marco normativo, los documentos de aprobación del proyecto, las notas periodísticas y las múltiples declaraciones públicas de los actores involucrados se buscó reconstruir la cronología del conflicto y reflejar las múltiples aristas y visiones de la problemática. A partir de ese trabajo se pudieron identificar los argumentos a favor y en contra del proyecto y contrastarlos con evidencia científica generada a nivel internacional y enmarcar el caso de estudio en los debates sobre la economía azul y la sustentabilidad de los océanos. Los resultados obtenidos permitieron establecer una línea argumentativa del conflicto e identificar elementos clave de la discusión acerca de los posibles escenarios futuros que podrían adoptarse para el caso de estudio.

https://doi.org/10.52292/j.rug.2022.31.1.0033.0053

10.

Into the blue - The blue economy model in Operation Phakisa 'Unlocking the Ocean Economy' Programme
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Loureiro, Tainã G.

; du Plessis, Nicole

; Findlay, Ken

South African Journal of Science

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Dic 2022, Volumen 118 Nº 11-12 Paginas 1 - 4

Resumen: En | Texto: En | PDF: En

SIGNIFICANCE: Economic and social benefits of ocean resource uses have motivated numerous nations, including South Africa, to turn to their Exclusive Economic Zones (EEZs) to advance economic development initiatives. Such initiatives result in increasing and spatially competitive pressures on ocean systems, compromising ecosystem services and market and non-market ocean benefits. It is critical to prioritise sustainable development in any ocean or blue economy advancement programmes (where the blue economy model most often parallels a terrestrial green economy, to incorporate sustainability and inclusivity pillars over and above the often GDP-centred ocean economy model). We explore multiple definitions of ocean and blue economies, discuss the importance of adopting blue economy models, and examine how the South African Operation Phakisa - Unlocking the Ocean Economy initiative presents numerous features aligned with ocean sustainable development, sustainability, and inclusivity, which strongly align it to a blue economy model

https://doi.org/10.17159/sajs.2022/14664

11.

Adsorção de corante azul reativo BF-5G utilizando casca de Manihot Esculenta Crantz
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Silva, Simone Keily Costa

; Santos, Andarair Gomes dos

; Leite, Ricardo Henrique de Lima

; Aroucha, Edna Maria Mendes

; Santos, Francisco Klebson Gomes dos

Matéria (Rio de Janeiro)

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2022, Volumen 27 Nº 1 elocation e13146

Resumen: Pt En | Texto: Pt En | PDF: Pt | PDF: En

RESUMO A indústria têxtil consome um volume significativo de água no processo de tingimento das fibras. As águas residuais geradas no processamento, além de turvas, devido à presença de corantes que não se fixam na fibra durante o processo de tingimento, são prejudiciais ao ambiente aquático e também aos seres humanos. Esse efluente deve passar por um processo de tratamento antes de ser lançado em corpos hídricos. O tratamento de águas contaminadas com o uso de bioadsorventes possui como vantagens o baixo custo de material e reciclagem de resíduo natural. Baseado no exposto, o objetivo deste trabalho foi avaliar a capacidade de adsorção do corante têxtil Azul Reativo BF-5G em casca de mandioca (Manihot Esculenta Crantz), resíduo proveniente da indústria de farinha de mandioca. A casca de mandioca foi lavada, seca e classificada. Os ensaios de adsorção, em banho finito, foram realizados em diferentes condições de pH, granulometria e temperatura. As capacidades máximas de adsorção, em 24 horas de contato, para as diferentes condições de pH, granulometria e temperatura, foram as seguintes: (qmáx=85,18 mg.g-1; pH=1; 30 °C; 16 mesh); (qmáx=52,30 mg.g-1; pH=0; 30 °C; 32 mesh); (qmáx=92,92 mg.g-1; pH=0; 30 °C; 48 mesh). O processo de adsorção foi espontâneo e exotérmico, o que leva a concluir que a casca de mandioca (Manihot Esculenta Crantz) é um potencial adsorvente para o corante Azul Reativo BF-5G, garantindo economia e praticidade no tratamento desse efluente.

ABSTRACT The textile industry consumes a significant amount of water in the fiber dyeing process. The wastewater generated in the processing, in addition to turbid, due to the presence of dyes that do not stick to the fiber during the dyeing process, are harmful to the aquatic environment and also to humans. This effluent must undergo a treatment process before being released into water bodies. The treatment of contaminated water with the use of bioadsorbers has the advantages of low material cost and recycling of natural waste. Based on the above, the objective of this work was to evaluate the adsorption capacity of the textile dye Blue Reactive BF-5G in cassava peel (Manihot Esculenta Crantz), residue from the cassava flour industry. The cassava peel was washed, dried and classified. The adsorption tests, in finite bath, were carried out under different conditions of pH, granulometry and temperature. The maximum adsorption capacities, in 24 hours of contact, were as follows: (qmax=85.18 mg.g-1; pH=1; 30 °C; 180 rpm; 16 mesh); (qmax=52.30 mg.g-1; pH=0; 30 °C; 180 rpm; 32 mesh); (qmax=92.92 mg.g-1; pH=0; 30 °C; 180 rpm; 48 mesh). The adsorption process was spontaneous and exothermic, which leads to the conclusion that the cassava peel (Manihot Esculenta Crantz) is a potential adsorbent for the Reactive Blue BF-5G dye, ensuring economy and practicality in the treatment of this effluent.

https://doi.org/10.1590/s1517-707620220001.1346

12.

Analysis of the physical, hydraulic, and mechanical properties of sugar bagasse ash-clay geomaterial physical hydraulic ashclay ash clay
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Mora-Ruiz, Viviana

; Riascos-Caipe, Martín

; Sánchez-Garcia, Fabian

; Villadiego-Vargas, Sara

; Arrieta-Baldovino, Jair

Matéria (Rio de Janeiro)

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2022, Volumen 27 Nº 4 elocation e20220273

Resumen: En | Texto: En | PDF: En

ABSTRACT Sugar cane bagasse ash (SA) is the result of the incineration of residues in the production of sugar which has as its final disposal the sanitary landfills generating environmental impacts. The practice of the circular economy for using SA ash as a stabilizer of clay soils in highway bases and sub-bases requires the study of the potential of ash as an alternative cement. Soil stabilization is commonly done with the addition of cement or lime; however, the production of these materials releases CO2 into the atmosphere. This research estimates the potential use of SA ash as a cementing agent considering the physical, hydraulic, and mechanical properties of clay soil mixed with percentages of 6, 8, and 10% of Uncalcined Sugarcane Bagasse Ash (USA) and Calcined Sugarcane Bagasse Ash (CSA). X-ray fluorescence spectrometry (FRX), methylene blue value test, specific gravity, dry unit weight, granulometric analysis, and Atterberg limits tests were carried out to evaluate the physical properties of the mixtures. One-dimensional consolidation tests, soil water characteristic curves (SWCC), standard Proctor compaction, unconfined compression, and direct shear were carried out to estimate the mechanical and hydraulic properties of the mixtures. An improvement in the physical, hydraulic, and mechanical properties was found with the addition of USA and CSA. Finally, based on the analysis of the physical, hydraulic, and mechanical properties of the Soil-USA and soil-CSA samples, it was determined that the best option as an alternative cementitious agent is found in the 8% Soil-CSA mixture due to the improvement in the plasticity index, gravity density, angle of friction, cohesion, and unconfined compressive in comparison with the other samples and the original soil. However, it is essential to mention that this cementitious addition can prejudice the hydraulic properties and consolidation process. It is vital to consider those parameters when realizing any geotechnical design with this mixture. (SA impacts subbases sub lime however CO atmosphere 6 8 10 (USA CSA . (CSA) Xray X ray FRX, FRX , (FRX) test weight mixtures Onedimensional One dimensional SWCC, SWCC (SWCC) compaction compression Finally SoilUSA soilCSA SoilCSA index density friction cohesion However process 1 (CSA (FRX (SWCC

https://doi.org/10.1590/1517-7076-rmat-2022-0273

13.

Blue growth: Sea urchin sustainable aquaculture, innovative approaches
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Rubilar, Tamara

; Cardozo, Dana

Revista de Biología Tropical

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Mar 2021, Volumen 69 Supl. 1 Paginas 474 - 486

Resumen: Es En | Texto: Es En | PDF: Es | PDF: En

Resumen Introducción: “Economía azul” se refiere a las economías basadas en el océano con un enfoque sostenible. Se enfoca en menores huellas de carbono y eficiencia, principios que se pueden aplicar a la acuicultura. Sin embargo, ha sido difícil desarrollar proyectos exitosos de economía azul en la acuicultura de erizos de mar. Objetivo: Comparar URCHINOMICS (Noruega) y ARBACIA (Argentina), dos proyectos de acuicultura con diferentes modelos de negocio. Métodos: Utilizamos información disponible públicamente para comparar ambas empresas sobre la base de su propuesta de valor y tensiones (por ejemplo, culturales, socioeconómicas y tecnológicas). Resultados: Para tener éxito, la acuicultura de erizos de mar requiere el desarrollo de tecnología adecuada, innovación abierta y cooperación de personas con diferentes antecedentes académicos, empresariales y organizativos. Conclusión: El éxito final de estas y otras empresas similares dependerá de la libre interacción de expertos de múltiples campos y de la innovación tecnológica.

Abstract Introduction: “Blue Economy” refers to ocean-based economies with a sustainable approach. It focuses in smaller carbon footprints and efficiency, principles that can be applied to aquaculture. However, it has been difficult to develop successful blue economy projects in sea urchin aquaculture. Objective: To compare URCHINOMICS (Norway) and ARBACIA (Argentina), two aquaculture projects with different business models. Methods: We used publicly available information to compare both companies on the basis of their value proposition and tensions (e.g. cultural, social economic and technological). Results: To be successful, sea urchin aquaculture requires development of appropriate technology, open innovation and cooperation of people with different academic, business and organizational backgrounds. Conclusion: The ultimate success of these and similar companies will depend on free interaction of experts from multiple fields and on technological innovation.

https://doi.org/10.15517/rbt.v69isuppl.1.46388

14.

The Mediterranean Sea we want
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Cappelletto, Margherita

; Santoleri, Rosalia

; Evangelista, Lorenza

; Galgani, Francois

; Garcés, Esther

; Giorgetti, Alessandra

; Fava, Fabio

; Herut, Barak

; Hilmi, Karim

; Kholeif, Suzan

; Lorito, Stefano

; Sammari, Cherif

; Lianos, Mónica Campillos

; Celussi, Mauro

; D’Alelio, Domenico

; Francocci, Fedra

; Giorgi, Giordano

; Canu, Donata Melaku

; Organelli, Emanuele

; Pomaro, Angela

; Sannino, Gianmaria

; Segou, Margarita

; Simoncelli, Simona

; Babeyko, Andrey

; Barbanti, Andrea

; Chang-Seng, Denis

; Cardin, Vanessa

; Casotti, Raffaella

; Drago, Aldo

; Asmi, Souha El

; Eparkhina, Dina

; Fichaut, Michèle

; Hema, Tatjiana

; Procaccini, Gabriele

; Santoro, Francesca

; Scoullos, Michael

; Solidoro, Cosimo

; Trincardi, Fabio

; Tunesi, Leonardo

; Umgiesser, Georg

; Zingone, Adriana

; Ballerini, Tosca

; Chaffai, Amel

; Coppini, Giovanni

; Gruber, Sieglinde

; Knezevic, Jelena

; Leone, Gaetano

; Penca, Jerneja

; Pinardi, Nadia

; Petihakis, George

; Rio, Marie-Helen

; Said, Mohamed

; Siokouros, Zacharias

; Srour, Abdellah

; Snoussi, Maria

; Tintoré, Joaquín

; Vassilopoulou, Vassiliki

; Zavatarelli, Marco

Ocean and Coastal Research

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2021, Volumen 69 Supl. 1 elocation e21031

Resumen: En | Texto: En | PDF: En

Abstract This paper presents major gaps and challenges for implementing the UN Decade of Ocean Science for Sustainable Development (2021-2030) in the Mediterranean region. The authors make recommendations on the scientific knowledge needs and co-design actions identified during two consultations, part of the Decade preparatory-phase, framing them in the Mediterranean Sea’s unique environmental and socio-economic perspectives. According to the ‘Mediterranean State of the Environment and Development Report 2020’ by the United Nations Environment Programme Mediterranean Action Plan and despite notable progress, the Mediterranean region is not on track to achieve and fully implement the Sustainable Development Goals of Agenda 2030. Key factors are the cumulative effect of multiple human-induced pressures that threaten the ecosystem resources and services in the global change scenario. The basin, identified as a climate change vulnerability hotspot, is exposed to pollution and rising impacts of climate change. This affects mainly the coastal zones, at increasing risk of extreme events and their negative effects of unsustainable management of key economic assets. Transitioning to a sustainable blue economy is the key for the marine environment’s health and the nourishment of future generations. This challenging context, offering the opportunity of enhancing the knowledge to define science-based measures as well as narrowing the gaps between the Northen and Southern shores, calls for a joint (re)action. The paper reviews the state of the art of Mediterranean Sea science knowledge, sets of trends, capacity development needs, specific challenges, and recommendations for each Decade’s societal outcome. In the conclusions, the proposal for a Mediterranean regional programme in the framework of the Ocean Decade is addressed. The core objective relies on integrating and improving the existing ocean-knowledge, Ocean Literacy, and ocean observing capacities building on international cooperation to reach the “Mediterranean Sea that we want”.

https://doi.org/10.1590/2675-2824069.21019mc 2 descargas

15.

Discussing the blue economy: considerations from a public expenditure review on tax exemption and subsidies
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Silverwood-Cope, Karen

; Ling, Marcelo

Ocean and Coastal Research

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2021, Volumen 69 Supl. 1 elocation e21025

Resumen: En | Texto: En | PDF: En

Abstract How should one assess whether traditional ocean industries and new ocean emerging activities have the right incentives to engage into a blue sustainable economy path? The case of Brazil’s Public Expenditure Review (PER) of tax exemption and subsidies applied to ocean related economic activities from 2011 to 2018 opens the debate. The extra-budgetary PER is applied with the Rio Markers from Organization for Economic Co-operation and Development (OECD), the economic activities listed by the World Bank´s Blue Economy, Ocean Decade’s results and Sustainable Development Goal 14 targets. The data on tax exemption and subsidies was obtained from official sources, from the Federal Government Budget System maintained by the Ministry of Economy. The screening was carried out for all national level tax relief and subsidies applied during 2011 and 2018. There were 316.4 billion reais (US$ 80.2 billion) spent by Brazil’s Federal government on ocean-related economic activities, either directly or indirectly, through subsidies and tax relief over 2011-2018. The accumulated GDP over that period was equivalent to 45.9 billion reais (US$ 11.6 billion). The sector that most benefitted is Agriculture (includes fishing), which received around 229.1 billion reais (US$ 58.0 billion) in incentives during this period. As for the method, it is necessary to develop and establish standardized ocean related markers in the economy and in PER reviews.

https://doi.org/10.1590/2675-2824069.21009ksc

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